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sound is the same it's the same headset just has a usb adapter and a different connector (4pole)
as for the siberia v2 meh can't answer that different sounds are good or bad to different people. plus one is open back the other is closed.
Having directly compared both - the bass on the Siberia is massively better than the HyperX - but the HyperX has better treble.
As I prefer bass, however, I miss my broken Siberia!
(Got that damned Megan Traynor song stuck in my head... time for some Sevendust and drown that sugarry mess out).